gun/sea/base64.js

    var u;
    if(u+''== typeof btoa){
      if(u+'' == typeof Buffer){
        try{ global.Buffer = require("buffer", 1).Buffer }catch(e){ console.log("Please `npm install buffer` or add it to your package.json !") }
      }
      global.btoa = function(data){ return Buffer.from(data, "binary").toString("base64") };
      global.atob = function(data){ return Buffer.from(data, "base64").toString("binary") };
    }